"In the Shadows" is the story of Julia and Magdalena, members of an elite group that strives to solve the most perplexing crimes in record time. They both have very different lives. Julia lives happily with her husband and son, and Magdalena searches for her stepfather, who abused her when she was a child. Julia's personal life takes a turn upon the return of Iván, a well-known criminalistics expert who was the love of her life years before and who abandoned her for some unknown reason. Magdalena will take an interest in him and will give life to a tense love triangle, which will unfold as they search as a team for those responsible for the most mysterious crimes of their careers.